Finishing the faces of concrete blocks.



No. 837,165. PATENTED NOV. 27,-1906 G. G. WIGHT & T. V. GALASSI.

FINISHING THE PAGES OF CONCRETE BLOCKS.

APPLICATION FILED MAR.24,1905.

UNITED STATES PATIENT OFFICE.

GEORGE C. WIGHT AND THEODORE V. GALASSI, OF SAN FRANCISCO,

CALIFORNIA.

FINISHING THE FACES OF CONCRETE BLOCKS.

Specification of Letters Patent.

Patented Nov. 27, 1906.

Application filed March 24.1905- Scrial No. 261,882-

To u,// whom it "my coltccrn:

Be it known that we, GEORGE O. Wmnr and THEODORE V. -\mssr. citizens of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful Improvements in Finishing the Faces of Concrete Blocks, of wlnch the following is a specification.

Our invention'relates to the construction of concrete blocks and producing upon the surface of such blocks a representation of a granite finish.

It consists in applying a mixture of marble or other chips and cement to the surface of the concrete block and then ex osing said surface to a sand blast, wherebyt e required granite ap earance is produced.

In the (rawings, Figure 1 is a perspective view of block after sand blast. Fig. :2 is a perspective view of block with polished surace. Fig. 3 is a perspective View of block with rock face.

It is the object of our invention to irovide a face for concrete-work which shali give a realistic appearance of granite, and this we do by an application of a mixture of marble or other chips with cement and applying this mixture to form a facing of the concrete. This facing we call tcrraso. This mixture is formed of small broken chips of any suit.- able or desired size mixed with cement. The blocks to which this compound is to be applied are made of concrete, either hollow or solid. The blocks may be rectangular or of other required shape, and the surfaces may be llut or irre ular, in the form of what is known as me face.

As shown in the drawings, A represents blocks of this description having the terraso face, as shown at .2, which represents a smooth flat surface, in which .2 shows the face after a sand blast has been applied thereto. 2 shows a polished face of the same, and 2" shows what is termed a rock face, these faces being first built up to any form desired. We then up )ly what is known as a sand blast, whic l abrades the surface and produces an appearance of granite. This granite face may be left in a rough 'unpolished condition, which remains after the sand blast, or it may be ground and polished smooth, as shown in 2.

When made of the rough irre ular rock face, as shown at "2", the surface wi lbe left in the rough,representing broken granite.

Blocks of this construction ma be molded in any desired form as is customary in'manufaeturing concrete blocks, the terraso surface afterward applied to the visible faces, and the sand blast directed upon these faces, so as to rodu'ce the required appearance.

ih the manufacture of what is known as gra}" or light-colored granite marble chips in differentv roportions to produce the desired color mayiie used. If a darker shade is to be made, broken slate or similar darkcolored rock may be used, and red rock or chips of that class of granite may be used to produce a reddish finish, and generally by varying the color of the rock or mixture which is used with the cement any desired color may be produced.

Having thus described our invention, what we claim and desire to secure by-Letters Patout, is-

The recess herein described of forming artificia building and like blocks and producing a granitic-appearing surface thereon, said process consisting, first in forming the blocks of concrete, then mixing broken rock, and chips with cement and applvin the same as a coating to the surface of t e lock, and then exposing thecoatcd surface to a San blast for the purpose of finishing the surfaceand giving thereto the desi ed appearance.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

GEORGE o. WIGHT. THEODORE v. GALASSI.

Witnesses:

- 8. 11. NoUnsE,

Jnssm (J. Baome. 

